\pgfkeys{/tikz/.cd,
	vertical factor/.initial=0.5,
	vertical factor/.get=\vertfactor,
	vertical factor/.store in=\vertfactor,
	start coordinate/.initial=
		{0,\vertfactor},
	sample line width/.initial=very thick,
	start coordinate/.initial =
		{another/. style={


					0,\vertfactor


				}},
	sample line width/.get=\samplelinewidth,
	start coordinate/.initial=
		{0,\vertfactor}
		{something else},
}
